Fitness basics
Learning Center
Abdominal pain
Everyone experiences abdominal pain from time to time. Find out when it might be cause for concern.
Age spots (liver spots)
Learn more about the harmless dark spots on your skin that tend to appear as you age, especially in areas exposed to the sun. Treatment is available.
Alzheimer's stages: How the disease progresses
Alzheimer's stages — common behaviors as the disease progresses.
Amenorrhea
Absence of menstruation (amenorrhea) may be linked to an underlying, treatable problem. Learn about amenorrhea causes and when to seek help.
Anal pain
Anal pain: Symptom — Overview covers definition, possible causes of this common symptom.
Arcus senilis: A sign of high cholesterol?
With this condition, older adults develop a gray arc around the cornea of the eyes.
Aspirin allergy: What are the symptoms?
An aspirin allergy or sensitivity can cause serious symptoms.
Baby fat: When is it cause for concern?
Find out when your baby's weight might be of concern and how to promote a healthy weight.
Balance exercises
Balance exercises can improve your balance and help prevent falls. See how they're done.
Bent penis
Learn what can cause a curved erection and when you may need to see a health care provider.
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